Kirstie Alley spoke up again -- defending her "circus fat" comment from a recent Jenny Craig commercial- this time on the "Rachael Ray" show.

In the commercial, Alley says, "I'm not like circus fat, I just want to lose 20 pounds."

The actress, in a taping of the "Rachael Ray" show, said: "I say I'm not fat-fat, I'm not circus fat, I've just gained 30 pounds. Well first of all, I'm talking about myself, and second of all ... I grew up in an era where my dad would take me to the fair and to the circus and they actually had fat ladies in the circus."